package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;
    /**
     * 新增套餐
     * @param setmealDTO
     * @return
     */
    @Transactional
    public void save(SetmealDTO setmealDTO) {
        //插入套餐数据
        Setmeal setmeal =new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmeal.setStatus(StatusConstant.DISABLE);
        setmealMapper.insert(setmeal);

        //插入套餐菜品
          Long setmealId= setmeal.getId();
          List<SetmealDish> setmealDishList= setmealDTO.getSetmealDishes();
            if (setmealDishList !=null && setmealDishList.size()>0){
                setmealDishList.forEach(item->{
                    item.setSetmealId(setmealId);
                });
                setmealDishMapper.insert(setmealDishList);
            }
    }

    /**
     * 套餐分页查询
     * @param setmealPageQueryDTO
     * @return
     */
    public PageResult page(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page<SetmealVO> page=setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 批量删除套餐
     * @param ids
     * @return
     */
    @Transactional
    public void delete(List<Long> ids) {
        //判断套餐是否起售 -起售不能删除
        ids.forEach(id->{
              Setmeal setmeal= setmealMapper.getById(id);
              if (setmeal.getStatus()== StatusConstant.ENABLE){
                  throw new DeletionNotAllowedException("起售的套餐不能删除");
              }
        });

        setmealDishMapper.delete(ids);
        setmealMapper.delete(ids);
    }

    /**
     * 根据id查询套餐
     * @param id
     * @return
     */
    public SetmealVO getById(Long id) {

          Setmeal setmeal= setmealMapper.getById(id);

          List<SetmealDish> setmealDishList  =setmealDishMapper.getDishBysetmealId(id);
          SetmealVO setmealVO=new SetmealVO();
          BeanUtils.copyProperties(setmeal,setmealVO);
          setmealVO.setSetmealDishes(setmealDishList);
        return setmealVO;
    }

    /**
     * 修改套餐信息
     * @param setmealDTO
     * @return
     */
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        //修改套餐信息
        Setmeal setmeal =new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.update(setmeal);

        //修改套餐里商品信息--先删除所有
        List<Long> id=new ArrayList<>();
        id.add(setmealDTO.getId());
        setmealDishMapper.delete(id);
        List<SetmealDish> setmealDishes=   setmealDTO.getSetmealDishes();
        if (setmealDishes !=null && setmealDishes.size()>0){
            setmealDishes.forEach(item->{
                item.setSetmealId(setmealDTO.getId());
            });
            setmealDishMapper.insert(setmealDishes);
        }

    }

    /**
     * 套餐起售、停售
     * @param status
     * @param id
     * @return
     */
    public void startOrStop(Integer status, Long id) {

        if (status==StatusConstant.ENABLE){
         List<Dish> dishList=  setmealDishMapper.getdishById(id);
         //
         dishList.forEach(item->{
             if (item.getStatus()==StatusConstant.DISABLE){
                 throw new  SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
             }
         });
        }
        Setmeal setmeal=Setmeal.builder()
                .status(status)
                .id(id)
                        .build();
        setmealMapper.update(setmeal);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }
    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
